Origin and geological significance of the 1.81 Ga hyalophane-rich   pegmatite veins from the high-pressure granulite terrain in the Central   Zone of North China Craton

doi:10.1007/s11430-011-4330-y

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	Origin and geological significance of the 1.81 Ga hyalophane-rich pegmatite veins from the high-pressure granulite terrain in the Central Zone of North China Craton
	Qu Min ; Guo JingHui ; Lai Yong ; Peng Peng ; Liu Fu
刊名	science china earth sciences
	2012
关键词	hyalophane pegmatite zircon Hf-O isotope high-pressure granulite Paleoproterozoic North China Craton TRACE-ELEMENT COMPOSITION PB ZIRCON GEOCHRONOLOGY U-PB SANGGAN AREA RETROGRADED ECLOGITES METAMORPHIC EVOLUTION HYDROTHERMAL ZIRCON TECTONIC EVOLUTION HENGSHAN COMPLEX T PATH
DOI	10.1007/s11430-011-4330-y
英文摘要	Hyalophane-rich pegmatites are identified from the Manjinggou high-pressure granulite terrain in the Central Zone of North China Craton. Based on field investigation, mineral assemblage and mineral geochemistry, two types of pegmatites can be defined, i.e., hyalophane pegmatite and hyalophane-rich pegmatite. The hyalophane pegmatite is composed of pure hyalophane with 18.7 mol%-19.4 mol% celsian, whereas the hyalophane-rich pegmatite consists of clinopyroxene + titanite + epidote + hyalophane with 11.9 mol%-12.5 mol% celsian. Hyalophane-rich pegmatite has typical magmatic zircons with oscillatory zoning and high Th/U ratios, implying that this type of pegmatite crystallized from special melt similar to magma. SIMS (Cameca 1280) zircon U-Pb dating shows that the crystallization age of the hyalophane-rich pegmatite is 1812 +/- 5 Ma, younger than the regional metamorphic age (peak of ca. 1.85 Ga). Zircon delta O-18 (8.0aEuro degrees aEuro"9.3aEuro degrees) and E > (Hf) (-7.0 to -2.7) values measured by SIMS suggest that the high-pressure granulite terrain was the source of these veins. Therefore, the hyalophane-rich pegmatite veins were likely to be generated by melting of the high-pressure granulite terrain during post collisional uplift. A quick tectonic uplifting process with a velocity of 0.4 to 0.6 mm/a has been estimated for the high-pressure granulite terrane from the Central Zone of North China Craton.; Geosciences, Multidisciplinary; SCI(E); EI; 0; ARTICLE; 2; 193-203; 55
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/235070]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Qu Min,Guo JingHui,Lai Yong,et al. Origin and geological significance of the 1.81 Ga hyalophane-rich pegmatite veins from the high-pressure granulite terrain in the Central Zone of North China Craton[J]. science china earth sciences,2012.
APA	Qu Min,Guo JingHui,Lai Yong,Peng Peng,&Liu Fu.(2012).Origin and geological significance of the 1.81 Ga hyalophane-rich pegmatite veins from the high-pressure granulite terrain in the Central Zone of North China Craton.science china earth sciences.
MLA	Qu Min,et al."Origin and geological significance of the 1.81 Ga hyalophane-rich pegmatite veins from the high-pressure granulite terrain in the Central Zone of North China Craton".science china earth sciences (2012).